Problem with GRTIII trigger install on nitro venom

[jccams]

So I have the GRTIII trigger blade installed in my nitro venom.  Problem is the tab on the bear trap lever is not clearing the fat pin when I pull the trigger.  The fat pin moves nice and free in the slot when the bear trap link is off.  The instructions indicate you may need to knock the corner off the tab to get it to clear.  In my case I'll need to file a bunch off, the spring holds that tab tight against the fat pin.  If I lift the bear trap link up and let the spring relax the tab is centered on the fat pin.  What's going on I have to be missing something there is no way I can get that tab to clear with the spring attached.

I assume the tab on the bear trap link should be in front of the fat pin, correct?

[Roadworthy]

You're taxing my memory.  I got a Nitro Venom nearly six years ago and the GRT III fit perfectly.  It was replaced on warranty and I think tiny changes were made on the newer one - enough that the anti beartrap wouldn't align.  I think I had to file it about 0.020" to make it all work.  That was little enough that it would still work with the original trigger, too.  Observe carefully how the anti beartrap works in conjunction with the trigger.  It must block the trigger to prevent firing with the barrel open but clear everything with the barrel closed.  If it appears a great deal of filing is involved you may be looking at it wrong in some way.  This should be a MINOR fix.

[jccams]

Well here was the problem.  The instructions specifically state to "break the barrel a few inches", the tab should clear the fat pin.  When I close the barrel it clears but the tab is tight against the fat pin with it open.  If this is correct the instructions are wrong. 

Now when you say "block the trigger" with the barrel open, I can still pull the trigger with the safety off and the fat pin will move the bear trap link out of the way, but there is spring pressure holding the tab against the fat pin.  When I close the barrel the tab is definitely clear of the fat pin.

If this sounds correct then all that is left is to put the stock back on and see if it goes boom.

[Roadworthy]

If the trigger pulls it will go "BOOM" if cocked.  Think of the anti beartrap as a kind of fail safe safety.  If you ALWAYS set the safety when you cock the gun and the safety prevents the trigger from being pulled you don't need the anti beartrap - which on this gun isn't really an anti beartrap in the same manner as you'll find with a fixed barrel anyhow.  As I recall when you open the barrel the spring pulls the linkage in such a way that it blocks the trigger from being pulled - I think by jamming the fat pin.  When the barrel is closed it pulls the beartrap linkage forward, clear of the fat pin.  The linkage on my gun wouldn't clear the fat pin at any time, hence the filing.  Observe carefully what goes on in the area of the fat pin when you open and close the barrel.  When I replaced the trigger pack on my Nitro Venom with an NP2 trigger pack I lost the anti beartrap feature.  The NP2 guns use a longer linkage piece.  I personally preferred  the loss of that feature as I could then uncock the gun without firing.

[jccams]

Thanks for all the help Roadworthy, it does indeed go boom.  Too cold here to spend any time outside with it today but it appears to work.  Still can pull the trigger with the barrel open, as it pushes the bear trap forward and stretches the spring.  I didn't file the tab so I guess this is the way it will be.  Don't really see how it could prevent the trigger from being pulled unless that tab was directly on top of the fat pin, but then it wouldn't clear with the barrel closed.  I do have a picture of what it looks like with the barrel open but can't figure out how to post it.

It would be nice to be able to uncock it without pulling the trigger.

I appreciate all the help with this whole fiasco.  I did put my old trigger pack back together so I now have a spare.  Learned a lot more about this rifle than I was planning on.

[mobilehomer]

Pictures would help greatly.

[jccams]

I couldn't figure out how to post pictures.  Anyway I now know what the problem is and will modify the tab on the bear trap linkage so it will move over top of the fat pin when the barrel is broken.  I was apprehensive to remove as much material as I have to as I thought something else was going on.  The location of the fat pin in the GRT trigger blade is quite a bit higher than the stock trigger blade.

[Roadworthy]

Glad you got it worked out.  Thanks for the update.